Carrier 38HB series, 38HF series, 40HF series, 40HB series Installation, Operation And Maintenance Instructions
Page 1
INSTALLATION, OPERATION AND
MAINTENANCE INSTRUCTIONS
38HB/HF
Nominal cooling capacity 19,3 - 36,9 kW
Nominal heating capacity 22,3 - 41,9 kW
50 Hz
Split-system units
Translation of the original document 80127, 07.2015
Page 2
Contents
1. Introduction .......................................................................................................................................................................................................3
2. Operating limits .................................................................................................................................................................................................3
3. Technical characteristics (EN-14511-2013) ......................................................................................................................................................4
4. Unit identifi cation ...............................................................................................................................................................................................5
5. Safety advice .....................................................................................................................................................................................................5
6. Transport ...........................................................................................................................................................................................................6
7. Location and assembling ..................................................................................................................................................................................6
Choise of location ..............................................................................................................................................................................................6
Sound level .......................................................................................................................................................................................................7
Anchorage for silent-blocks ...............................................................................................................................................................................7
Minimum free space for commissioning and maintenance operations (mm) ....................................................................................................8
8. Checking before commissioning .....................................................................................................................................................................8
Electrical connections .......................................................................................................................................................................................8
Condensate drain connection ...........................................................................................................................................................................9
Checks in the centrifugal fans .........................................................................................................................................................................10
Air ducts connections ......................................................................................................................................................................................10
Cooling connections ........................................................................................................................................................................................11
9. Safety elements ..............................................................................................................................................................................................12
10. Optional ...........................................................................................................................................................................................................12
Condensation pressure control (38HB/HF) .................................................................................................................................................................12
Filters (40HB/HF) ............................................................................................................................................................................................13
Hot water coil (40HB/HF) ................................................................................................................................................................................13
Electrical heater (40HB/HF) ............................................................................................................................................................................13
11. Commissioning ................................................................................................................................................................................................15
Checks prior to commissioning .......................................................................................................................................................................15
Possible problems at commissioning ..............................................................................................................................................................15
Operational checks .........................................................................................................................................................................................16
12. Maintenance ....................................................................................................................................................................................................16
13. Control and analysis of breakdowns................................................................................................................................................................19
Split-system cooling units
and heat pumps
2
Page 3
1. INTRODUCTION
2. OPERATING LIMITS
The 38HB/HF cooling units and heat pumps are units which feature a
split-system construction with components optimised for the R-410A
refrigerant.
They are presented in two different elements:
- An outdoor unit (38HB/HF series) which features a horizontal
construction and is equipped with a centrifugal fan, a hermetic
scroll-type compressor and an electric panel with electronic control.
Supply and return air on the same side.
- An indoor unit or or air-conditioning unit (40HB/HF series) which
features a horizontal construction and has supply and return air on
the same side.
• 38HB/HF series
38HB series: Outdoor unit cooling-only air-condensed with
centrifugal fan, horizontal design, designed for installation indoors.
38HF series: Outdoor unit heat pump air-air reversible with
centrifugal fan and expansion valve, horizontal construction,
designed for indoor installation.
•
40HB/HF series
40HB series: Indoor unit cooling only with centrifugal fan and
expansion valve, horizontal construction, designed for installation
on premises connected to a network of ducts.
40HF series: Indoor unit heat pump reversible with centrifugal fan
and expansion valve, horizontal construction, designed for installation
on premises connected to a network of ducts.
The units comply with standards: EN 60-204 - EN 378-2, and directives:
Machinery 2006/42/EC - EMC 2004/108/EC - LVD 2006/95/EC - PED
2014/68/EC (Category 2).
Those in charge of the installation, commissioning, operation and
maintenance of the unit must know the instructions contained in this
brochure and the specifi c technical characteristics of the installation
place.
With a condensation pressure control operating down to -10ºC.
When the outdoor temperature is usually below 5ºC WB it is recommended
installing a support element.
Inlet air conditions
Cooling Heating
Indoor
coil
Minimum
14 ºC WB 10 ºC
Maximum
22 ºC WB 27 ºC
Outdoor
coil
Minimum
12 ºC -10 ºC WB
Maximum
48 ºC 15 ºC WB
Split-system cooling units
and heat pumps
3
Page 4
3. TECHNICAL CHARACTERISTICS (EN-14511-2013)
38HB/HF 80 90 120 160
Cooling
capacities
Cooling capacity (kW)
19,3 21,2 27,3 36,9
Power input (kW)
8,0 9,6 11,5 14,2
EER performance
2,40 2,20 2,38 2,60
Heating
capacities
Heating capacity (kW)
22,3 24,2 32,0 41,9
Power input (kW)
7,7 9,1 10,6 13,5
COP performance
2,88 2,67 3,03 3,11
Outdoor
circuit
centrifugal
fan
Nominal air fl ow (m
3
/h)
6.500 7.000 10.000 12.200
Available static pressure (mm.w.c)
25 20 20 20
Number / turbines
1 / 1
Motor output (kW)
3345,5
Power input (kW)
2,33 2,71 2,51 3,18
Speed (r.p.m.)
1.489 1.522 940 836
Compressor
Type
Scroll
No. compressors / circuits / stages
1 / 1
Oil type
Copeland 3MAF 32 cST, Danfoss POE 160 SZ, ICI Emkarate RL32 CF, Mobil EAL Artic 22 CC
Volume of oil (l)
1,6 3,0 3,3 3,3
Cooling
connections
Liquid line
1/2" 1/2" 5/8" 5/8"
Gas line
7/8" 7/8" 1 1/8" 1 1/8"
Refrigerant
Type
R-410A
Global warming potential (GWP)
2.088
Load up to 7,5 m (kg)
6,5 6,6 7,8 10,2
Environment impact (tCO2 e)
13,6 13,8 16,3 21,3
Electrical
features
Mains voltage
400 V / III ph / 50 Hz (±10%)
Power supply
3 Wires + GND
Maximum
absorbed
current
Compressor (A)
15,9 15,3 20,1 25,1
Fan (A)
6,9 6,9 9,0 11,6
Control (A)
0,9 0,9 0,9 0,9
Total (A)
23,7 23,1 30,0 37,6
Dimensions
Length (mm)
1.680 1.680 2.088 2.088
Width (mm)
915 915 1.198 1.198
Height (mm)
670 670 810 810
Weight (kg)
224 245 322 344
40HB/HF 80 90 120 160
Indoor
circuit
centrifugal
fan
Nominal air fl ow (m
3
/h)
4.000 4.600 6.000 7.000
Available static pressure (mm.w.c)
20 20 20 20
Number / turbines
1 / 1
Motor output (kW)
1,5 2,2 2,2 2,2
Power input (kW)
1,07 1,48 1,56 1,62
Speed (r.p.m.)
1.497 1.613 1.219 1.030
Max. abs.current Fan (A)
3,6 5,0 5,0 5,0
Dimensions
Length (mm)
1.500 1.500 1.831 1.831
Width (mm)
870 870 1.103 1.103
Height (mm)
639 639 706 706
Weight (kg)
125 128 171 181
Cooling capacity calculated in accordance with the EN-14511-2013 standard given for indoor temperature conditions 27ºC (19ºC WB) and 35ºC outdoor temperature.
Heating capacity calculated in accordance with the EN-14511-2013 standard given for indoor temperature conditions 20ºC and 6ºC WB outdoor temperature.
Total power input by compressors and motorised fans under nominal conditions, calculated in accordance with the EN-14511-2013 standard.
Climatic warming potential of a kilogram of fl uorinated greenhouse gas in relation to a kilogram of carbon dioxide over a period of 100 years.
Split-system cooling units
and heat pumps
4
Page 5
4. UNIT IDENTIFICATION
Note: The serial number must be used in all communications
regarding the unit.
Check the condition of the equipment upon delivery.
Check that the details on the label, the packing and the data plate
match the order.
If equipment has been damaged, or there is a shortfall in delivery,
notify accordingly.
All units bear, legibly and indelibly, a data plate located in a prime space,
as appears in the attached image: Check that this plate matches the
correct model.
An.Year
CARRIER SCS
Route de Thil
01122 Montluel–France
Tél: 33(0)4 72 25 21 21
Ref. Produit
\Item Nb
r
Designation\Description
Refrigerant kW Absorbee\
Input
Poids\
Weight
Refrigerant kg Tension\Voltage Temperature Maxi C
BP Mini PSM
\MOP
Intensité\Current A
IP
HP Maxi PSM
\MOP
Int. Kit Elect.
No CE
0056
No Serie\Serial Nb
r
No Produit
Contains fluorinated greenhouse gases regulated by the Kyoto protocol
UTC BIS
P.I. Llanos de Jarata
14550 Montilla - SPAIN
Phone: 34 957 65 23 11
Made in Spain
5. SAFETY ADVICE
These units work with refrigerant gas R-410A. This fl uid is used up
to a maximum service pressure of 42 bar.
To avoid any risk of accident during installation, commissioning or
maintenance, it is obligatory to take into consideration the following
specifications for the units: refrigerated circuits under pressure,
refrigerant presence, electrical voltage presence and implantation place.
Because of all of this, only qualifi ed and experienced personnel can
perform maintenance tasks or unit repairs.
It is required to follow the recommendations and instructions
in the maintenance brochures, the labels, and the specifi c
instructions.
It is necessary to comply with the norms and regulations in
effect. It is recommended to consult the competent authorities
regarding the applicable regulations for users of units or
components under pressure. The characteristics of these units
or components are included on the plates of characteristics
or in the regulatory documentation provided with the product.
In case of a leak:
- Toxicity: According to ASHRAE 34, R-410A belongs to the A1/A1 group,
i.e. with high safety both in the mix and also in the case of a leak.
- Although it is not toxic, in case of a leak to atmospheric pressure the
liquid phase evaporates. The resulting vapours are heavier than air and
can displace the technician local air. In case of an accidental discharge
in a closed enclosure, fans must be used to eliminate said vapours.
- Although the R-410A is not fl ammable, when in contact with a fl ame
o hot spot it can decompose in fl uorhydric acid HF and fl uophosgene
COF
2
which are highly toxic and corrosive.
- To detect leaks, an electronic leak detector, an ultraviolet lamp or
soapy water must be used. Flame detectors do not help.
Important: Immediately repair any refrigerant leak, using
a recovery unit specifi c for R-410A that avoids a possible
mixture of refrigerants and/or oils.
The compressor and line surfaces can reach temperatures
above 100ºC causing burns to the body. In the same fashion,
under certain conditions these surfaces can reach very cold
temperatures that can cause freezing risks.
Use safety goggles and gloves on the job. Be careful with sharp
parts or elements in the unit.
V-220005
V-220004
Caution: Before intervening in the unit, verify that the main
power to the unit is cut off. An electric shock can cause
personal damage.
Refrigerant leaks:
A periodical check must be performed for refrigerant gas leaks as
per Regulation (CE) Nº517/2014 over certain greenhouse effect
fl uoride gases. Please, consult the frequency of checks in chapter
of “Maintenance”.
Components of the R-410A R-32 R-125
Chemical formula
CH2F2 CHF2CF3
Weight ratio
50% 50%
Unitary global warming potential (GWP)
675 3.500
Global warming potential (GWP)
2.088
Note: In order to recycle these units follow the stipulations of
Directives 2002/96/EC and 2003/108/EC regarding electrical
and electronic equipment and the management of the resulting
waste.
Split-system cooling units
and heat pumps
5
Page 6
38HB/
HF
Centre of
gravity (mm)
Weight
(kg)
XYZ
80
879 522 283 224
90
903 543 276 245
120
1087 708 337 322
160
1100 705 337 344
40HB/
HF
Centre of
gravity (mm)
Weight
(kg)
XYZ
90
710 422 241 125
100
702 422 245 128
120
847 549 275 171
160
821 548 286 181
6. TRANSPORT
The unit must be handled with care to avoid transport damage. Thus
we recommend:
- Do not dispose of the transport supports or the packaging materials
until the unit is in its fi nal location.
- For transport in a container, one must be selected that has an easy
load and unload to the installation location.
- The unit must be lifted and fi xed with care, with maximum inclination
of 15º, since it could harm its operation. Please see the weight and
the gravity centre coordinates of each model stated in the following
table.
Outdoor unit
38HB/HF
7. LOCATION AND ASSEMBLING
Choise of loc a t ion
Before moving the unit, make sure that all panels are fastened in place.
Lift and lower with care.
When choosing the location, whatever may be the selected fashion, the
following precautions have to be taken into consideration:
- It is mandatory to comply with norm EN 378-3 on Safety and
Environmental Requirements. Part 3: “In situ” installation and
protection to people.
- The area where the unit will be located must be perfectly accessible
for cleaning and maintenance operations (check minimum free space
for maintenance). Leave enough space for air circulation around the
unit.
- Foresee appropriate damping devices in all the installation so that
noise and vibration transmission is avoided (refer to the section
“Anchorage for silent-blocks”).
- It is necessary to check that the surface of the fl oor or the structure
supports the weight of the unit (please, consult the weight of the unit
in the section “Centre of gravity coordenates”).
Both the outdoor unit 38HB/HF and the indoor unit 40HB/HF have been
designed for working indoors, with ducted supply and return air. In this
case, the following aspects must also be considered: :
- All models can be installed on the fl oor or on a brick frame or steel
profi le. In any case, check that the unit is perfectly level.
- All models of 40HBHF units can be attached to the ceiling using the
threaded rod:
• Insert in the framework ceiling 4 threaded rods.
• Insert the rods through the holes the unit has in its base.
• Place the antivibration mounts, insert a washer and turn the nuts
until the unit is well secured.
• If there is enough space between the framework and the unit, a
rubber or neoprene plate can be squeezed in.
• Once these operations are fi nished, a false ceiling can be mounted
to hide the unit, leaving a register cover to perform the maintenance
and fi lter cleaning operations
.
.
- When installing a false ceiling, it is necessary to leave a register
cover to perform the maintenance operations. Access for cleaning
the fi lter must be prepared for the indoor unit. . If the installation has
an air return which is not ducted, appropriately-sized grids must be
planned in the space formed by the false ceiling, the framework and
the walls so that the unit sucks the return air from the air-conditioned
spaces.
- Ensure that the location of the outlet and return grilles does not
generate air recirculation.
- Check that there is no obstruction in the air outlet and return due to
tightly closed grille slats.
- The units can be handled with a forklift truck, taking all necessary
precautions to avoid sliding of the unit on the truck’s fork.
Indoor unit
40HB/HF
Split-system cooling units
and heat pumps
6
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Anchora ge for sile nt-blocks
B
A
B
A
38HB/HF A (mm) B (mm) Ø
80 and 90
1630 728 M8
120 and 160
2038 974 M8
40HB/HF A (mm) B (mm) Ø
80 and 90
1450 630 M8
120 and 160
1781 863 M8
Outdoor unit
38HB/HF
Indoor unit
40HB/HF
Sound leve l
These units have been designed to operate with a low sound level. In any case, in the design of the installation, it must be taken into consideration:
the outdoor environment for the acoustic radiation, the type of building for the noise transmitted in the air and the solid elements for the vibration
transmission. If necessary, a study must be commissioned to an acoustic technician.
38HB/HF 80 90 120 160
dB(A)
79,1 81,5 79,2 83,9
38HB/HF 80 90 120 160
dB(A)
65,0 68,4 68,5 69,7
40HB/HF 80 90 120 160
dB(A)
65,9 64,6 65,2 64,2
C) The sound pressure level of the indoor unit, with the ducted supply and discharge connections, measured at a distance of 5 metres, in
open fi eld, directivity at 2 and 1.5 metres from the ground, is:
B) The sound pressure level of the outdoor unit, measured at a distance of 5 metres, in open fi eld, directivity at 2 and 1.5 m from the ground, is:
A) The sound power level in the outdoor unit fan supply to be taken into account for the silencer operation:
Note: The sound pressure level depends on the installation conditions and, as such, is only indicated as a guide.
Split-system cooling units
and heat pumps
7
Page 8
8. CHECKING BEFORE COMMISSIONING
Electronic control
• CARRIERrtc basic
All 38HB/HF units have the CARRIERrtc basic electronic control,
comprised of a control board and a TCO user terminal.
Optionally, this control can have a pGD1 terminal for maintenance
that facilitates the initial scheduling of the unit, the modifi cation of the
operating parameters and the description of the alarms produced.
Recommendations for installation of the TCO terminal
From the thermostat some of the unit
operation aspects are controlled: operation
modes, setpoint, differential, timings...
Because of this, it is very important to
chose an appropriate location within the
room since in it is where the unit’s control
probe is located. This probe must report
about the environmental conditions of the
occupied area.
The thermostat must be fi xed at a height of 1,5 metres from the
ground and all possible interferences must be avoided: sun, outdoor
air, internal heat sources... Mount the thermostat to the wall using
the bracket, do not leave it hanging from the wire or embedding it
in the wall.
750
750
750
750
750
750
Outdoor unit 38HB/HF
Indoor unit 40HB/HF
Minim um fr e e spa c e for c ommiss ioning a nd ma int e nanc e ope ration s (m m )
NOTE: Under no circumstance should the unit be started without having read the brochure completely.
Electrica l c onnections
Installation norms
To perform the electric installation of the unit (cable glands, conductor
section and their calculations, protections, etc.), refer to the information
provided in this document (see the technical characteristic table), the
electrical scheme included with the unit and norms in effect that regulate
the installation of air conditioning units and electrical receivers.
The electric power supply of the unit must be sized in accordance with
the maximum power input by the unit taking into account all the options
it features (if necessary, refer to the technical brochure).
Verify that electrical power corresponds to the one on the data plate
and that the voltage remains constant.
Check that the electrical connections are correct and tight
(an electrical diagram is included with each unit, along with
its legend).
Note: All connections in the site are the responsibility of
the installer. These connections are always made as per
the current regulation.
To prevent electrical shocks, make all electrical connections
before energizing the unit. Check that the automatic switch is
closed. Omitting this can cause personal damage. Make the
ground connection before any other electrical connection.
V-220004
V-220005
The installer must fi x line protection elements according to
the effective legislation.
Note: Please refer to the CARRIERrtc basic & medium control brochure
to obtain more detailed information about its operation.
Split-system cooling units
and heat pumps
8
Page 9
Connection chart
31
32
33
1
2
5
6
16
17
4
14
12
11
7
13
15
Return or ambient T probe (opt.)
Indoor fan thermal protection
Indoor fan power supply
Outlet T probe
Electrical heaters (opt.)
Electrical heaters safety (opt.)
HWC 24Vac signal (opt.)
Air flow control (opt.)
Clogged filter detector (opt.)
Without neutral (std.)
and/or soft starter (opt.)
HWC valve (opt.)
pGD1 maintenance terminal (opt.)
Remote on/off (opt.)
Main failure signal (opt.)
Power supply
TCO user terminal
Outdoor unit
38HB/HF
Indoor unit
40HB/HF
No. 38HB/HF - 40HB/HF 80 90 120 160
1 Power supply 400 III (±10%) 3 + GND
2
TCO user terminal connection
2 wires for power supply 230V + 1
shielded cable for communication
type AGW20 / 22 (1 braided pair
+ drainwire + shielding)
4 Indoor fan power supply 3 + GND
5 Thermal relay signal of the indoor fan 2 wires
6 Outlet temperature probe 2 wires
7
Return or ambient temperature probe
(optional)
2 wires
11 Clogged fi lters detector (optional) 2 wires
12 Air fl ow control (optional) 2 wires
13
Unit without neutral (std) and/or soft
starter (opt.)
1 wire
14 HWC 24 Vac signal (optional) 2 wires
15 HWC valve (optional) 1 wire
16
Electrical heaters (optional)
3 wires (per stage) + GND
17
Safety thermistors of electrical
heaters (optional)
2 wires
31
pGD1 maintenace terminal
connection (optional)
telephone cable 6 wires
standard (RJ12 connector)
32 Remote on/off (optional) 2 wires
33 Main failure signal (optional) 2 wires
Condensat e drain c onne c t ion
CONNECT SIPHON
METTRE SIPHON
PONER SIFON
V220014
All the units, both outdoor and indoor,
are equipped with a condensates drain
pan, with a bronze, gas threaded M 3/4”
drain junction.
Pan drain
Outdoor unit
38HB/HF
Indoor unit
40HB/HF
If the unit is going to be installed in an industrial environment with a high level
of electromagnetic interference, it is recommended to shield the cables of the
thermostat control.
The power supply for the electrical heater must be protected by an automatic
switch and/or fuses to be foreseen by the installer.
Siphon installation norms
All water drain tubes must be provided with a siphon to avoid bad smell
and water spills.
Pan in overpressure:
- It’s installed to avoid the access through the drain piping of bad smells.
Pan in underpressure:
- Besides the above application, water must be suctioned from the pan
because of the depression with respect to the motorfan assembly.
- Perform the siphon assembly as per the scheme of the attached
starting diagram:
• For the correct siphon design, the "A" height must be at least twice
that of the underpressure (mmwc) where the condensate pan is
placed.
• Check that the condensate outlet is not clogged.
• The drain piping must be slightly sloped to ease circulation towards
the drain.
• The original diameter of the piping must be respected. No reduction
can be made.
• In the case of units installed outdoors, with outdoor temperatures
which are lower than 0ºC the necessary precautions must be taken
to prevent the water in the drain piping from freezing.
Check the watertightness of the connection.
A
Condensates pan
in depression
A
Siphon drain
Slight slope
5/1000
To drainage
Split-system cooling units
and heat pumps
9
Page 10
• Soft starter detail (optional):
Soft starter of the supply centrifugal
fan which prolongs the set time,
available for indoor units 40HB/HF.
It’s mainly aimed at installations with
cloth ducts.
Pulley and belt calibration
Attention: Before performing these operations, it is necessary to verify
that the unit is disconnected from mains.
Centrifugal motorfans are coupled with pulleys and belts.
In this type of fans, the following must be taken into consideration:
- The pulleys must be on the same plane, so it is important to check
them with the help of a ruler or a laser aligner.
- In case they are not aligned, remove the pulley screws, remove the
pulley and, after removing the taper pin, it can be slid over the axle
(this action can be performed both in the motor as well as in the fan).
- After fi xing the pulleys on the same plane, the belt tension is made
by tightening the tensor screw.
- The belt tension must be checked after 24 hours of motor operation.
Checks in the centrifuga l fa ns
- Before commissioning, check the blade rotation direction and that
the axis turns without strokes nor vibrations
- Once running, check the operation conditions: pressures, fl ows and
consumptions.
- The overlapping of characteristic curves of the fan and the room is
very important, so that the fl ows and pressures provided to the duct
network are as required.
Pulleys must stay on the same plane
Tensor
screw
Pulley
screws
Taper pin
Caution: Indoor units are designed to connect to a duct
network. In the event that the outlet fan of the indoor circuit
is accessible from a particular point in the duct network, the
installer must install a protection mesh in the discharge as
per the current regulation.
Air ducts c onnections
The air supply and return ducts must be calculated in accordance with
the rated fl ow and the unit’s available pressure (refer to the technical
characteristics table). The duct calculation and design must be made
by qualifi ed technical personnel.
It is advisable to take into consideration the following recommendations:
- Curves in the fan supply outlet(s) must be avoided. It is
recommendable to have a straight section of duct measuring
approximately 1 metre. If it is not possible, they must be as smooth
as possible, using indoor defl ectors when the duct is of large
dimensions.
- When making the ducts, direction sharp changes must be avoided
since they can generate occasional pressure drops, which affect
the available pressure and the fl ow. The location of discharge and
aspiration grilles must be studied carefully to avoid the air recirculation
and the transmission and generation of noises to the interior.
- Flexible connections must be made between the ducts and the unit
that avoid the noise and vibration transmission.
- No matter the type of ducts type to use, these must be insulated
and not be composed of materials that propagate fi re nor expel toxic
gases in the event of a fi re. The internal surfaces must be smooth
and should not pollute the air that circulates within them. In any case,
the effective legislation about this issue must be respected.
Split-system cooling units
and heat pumps
10
Page 11
LG
40HB/HF
indoor
unit
Maximum equivalent length of the cooling line: 7 metres
Outdoor unit bottom
38HB/HF
outdoor
unit
L: liquid line
G: gas line
Siphon in gas line for every
3 metres of drop
Maximum height 6 m
LG
Maximum equivalent length of the cooling line: 30 metres
For longer lenghts it is necessary to consult optional
Outdoor unit top
38HB/HF
outdoor
unit
40HB/HF
indoor
unit
L: liquid line
G: gas line
Siphon in gas line for every
3 metres of drop
Maximum geometric height 20 m
Once installed the outdoor and indoor units, the cooling links must be
laid between them
La maximum equivalent length of the cooling line is 30 metres, with a
maximum geometric height of 20 metres when the outdoor unit is high.
The optional available depending on the equivalent equivalent length
between indoor and outdoor unit:
- Medium-distance option (for an equivalent length from 30 to 50
metres): particle separator.
- Long-distance option (for an equivalent length longer than 50 metres):
particle separator + oil separator.
If it is the indoor unit which is high, the maximum equivalent length is
reduced to 7 metres.
Cooling conn ections
It is recommended to place a siphon in the gas line every 3 meters of
shoulder to ease the oil return to the compressor.
For determining the equivalent length, the pressure drops
in accessories must be taken into account.
Connection of the unit to the cooling lines
For the refrigerant lines, use only cooling type seamless tubes. Under
no circumstance use sanitary type copper pipe.
Following these steps is recommended:
- Revise and clean the tube ends to eliminate the burs from cutting
them and any other impurity that could have deposited inside or on
the outer surface. How clean the tubes are will dictate the degree or
air tightness. Also, we will avoid the dirt formation that may collapse
some spots in the cooling circuit.
- Apply isolator to the piping, covering them and affi x it with tape. The
material used must guarantee the air tightness at operation pressure
and temperature.
- Remove the plugs that protect the cooling connections of the unit
precisely at the moment of connecting the tubes.
- Align precisely both parts of the connection (unit and piping). There
is no error risk when both tubes have different diameters.
- Run a pressure test in the cooling tubes and a search for leaks to
verify the cooling installation.
- Create a vacuum in the installation to eliminate humidity inside the
circuit.
- Charge the unit with gas as per the data stated in the technical
characteristic table. Add the refrigerant slowly via the schrader
valve built into the liquid line, whilst the compressor is in operation,
monitoring the pressures to detect if there are any possible
anomalies.
- If the equivalent length of the cooling lines is over 7 m, an additional
charge will be needed per meter as per the following table.
Tube installation norms must be
respected and inspect carefully the tube
lay out, looking for the shortest distance
and the lowest possible number of
curves. Also, chokes must be avoided,
using large curve radii (the curve radius
must be ≥ 3,5x
Pressure drops in elbows expressed as equivalent lengths (m):
r
Æ
Tube diameter (inches) 1/2” 5/8” 7/8” 1 1/8”
Equivalent elbow length 45º (m) 0,24 0,30 0,39 0,48
Equivalent elbow length 90º (m) 0,45 0,54 0,72 0,90
Equivalent elbow length 180º (m) 0,75 0,80 1,00 1,30
Note: To ensure that the gas charge is correct, when performing
the “unit operation verifi cation” the subcooling of the liquid must be
checked.
Nominal diameter (“) 1/4” 3/8” 1/2” 5/8” 3/4” 7/8” 1” 1 1/8”
Indoor section (cm
2
) 0,149 0,444 0,900 1,505 2,282 3,120 4,290 5,346
Liquid line charge (g/m) 19,3 57,0 115,0 193,5 292,3 404,1 550,3 685,7
Gas line charge (g/m) - 0,2 0,4 0,7 1,0 1,4 2,0 2,5
Split-system cooling units
and heat pumps
11
Page 12
9. SAFETY ELEMENTS
Clogged fi lter detector (optional)
Differential pressostat for indication, through an automatic reset alarm,
of a level of dirtiness of the fi lters greater than the established level.
This pressostat is installed in the factory in the indoor unit.
Control of air fl ow (optional)
A differential pressostat can be incorporated in order to measure the
variation in air fl ow. This pressostat allows the detection of fan belt
breakages, since the fan relay only detects operating faults that have
arisen in the motor. This safety device is included in units with electrical
heaters. This pressostat is installed in the factory in the indoor unit.
10. OPTIONAL
Condensat ion pre ssure cont r ol (38HB /HF)
This control is advisable for outdoor units 38HB/HF that work in cooling
with an outdoor temperature below 15ºC.
In units with centrifugal fan a check is performed per damper in the fan
supply. A servomotor opens or closes the damper depending on the
proportional signal 0-10V received from the electronic control system.
V-220004
Damper
Servomotor
The installation of some of these options brings in pressure
drops at air level therefore this must be considered when
selecting fans.
The pressure drop graphs in the options, can be seen in the
technical brochure.
High pressure pressostat
Connected to the compressor discharge, it will
stop its operation when the pressure at that point
reaches the setpoint. It disconnects at 42 bar and
it is automatically reactivated.
Low pressure pressostat
When connected to the compressor suction, it
will stop its operation when the pressure at that
point goes down below the tare value (caused
by obstructions in the circuit, excessive dirt in the
fi lters, fan stop or ice formation in the evaporator).
This pressostat disconnects at 2 bar and is automatically reactivated.
Safeties at the compressor
The scroll type compressor that these units as standard have the
following safeties:
- Non-return valve built into the compressor.
- Temperature probe for the discharge from the compressor to protect
the unit with discharge temperatures greater than 135ºC.
Defrost control
This safety device is intended to eliminate ice which could accumulate in
the outdoor coil when the unit is working in the heating cycle. Defrosting
is carried out by the control depending on the value measured by the
sensor(s) on the outdoor coil(s) and the time set between defrosting
operations.
Magnetothermals for line protection
They are located at the beginning of the power lines for the
compressor(s) and motor fan(s) to protect them.
Automatic switch in the control circuit
Magnetothermal switch that protects the operation circuit against
continuous surges as well as against high currents of short duration
(short circuits).
Main door switch
By using a mechanical device, it impedes access to the electric panel
when the unit is with voltage.
Anti-fi re safety
With the optional return air probe, the electronic control can activate an
anti-fi re safety device that detains the unit when the return air surpasses
a temperature of 60°C (by default). It cannot return to operation until
the temperature has dropped to below 40ºC.
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and heat pumps
12
Page 13
Hot w ater co il (40HB/H F)
Hot water coil for assembly in duct with a three-way valve managed
by the electronic control of the unit.
HOT WATERCOIL
BATTERIE D’APPOINT
BATERÍADE APOYO
HOT WATERCOIL
BATTERIE D’APPOINT
BATERÍADE APOYO
Electrica l heate r (40HB/H F)
- The auxiliary electrical heaters are ready for operation in one power
stage.
- The electrical heaters acquired with the unit will be incorporated to
it modifying the electric panel in the factory, so that it is compatible
with the electronic control.
- The electrical heaters requested for units already shipped will be
sent in a kit, and the installer will need to assemble the elements
required for the operation of the unit and for compliance with the
legal regulations that are applied to the modifi ed unit with regard to
safety.
Important: with this option, the air fl ow controller is included.
Frame for assembly of the auxiliary electrical heaters in the fan
discharge
40HB/HF Output
Dimensions (mm)
ABC
80 / 90
3 to 6 kW
(1 row)
150 432 341
9 to 12 kW (2 rows)
262 432 341
120
3 to 6 kW (1 row)
150 432 341
9 to 12 kW (2 rows)
262 432 341
12 to 18 kW (2 rows)
262 482 443
160
3 to 12 kW (1 row)
150 547 443
15 to 18 kW (2 rows)
262 547 443
Filt e rs (4 0 H B/H F)
All model types can substitute the fi ltering mesh that the units include
regularly with G4 rating, mounted on the same frame.
The frame has access
designed from the right side
for maintenance.
To access the electrical
heaters, the screws that
fasten the frame side panel
must be unscrewed as shown
in the illustration.
Access panel
Access for maintenance:
Filter removal:
The fi lter is assembled over a steel metal profi le. By dragging a tab, it
slides laterally by the rail. Then, the fi lter is removed vertically.
Frame in
displacement
Tab for
sliding
Recommendations:
- Coil fi lling:
• The coil fi lling must be made with the bleeder valve open until
water runs through it, which is when it is time to close it.
• Cut off the water supply and let the bubbles generated go up to
the highest coil point, which is the same as the bleeder valve, and
eliminate by opening the purger.
• Pour more water into the circuit and repeat the previous steps.
• Activate the water pump (to be foreseen by the installer) and
repeat the previous steps until no air noises are heard in the
piping, which is when the fi lling of the installation will have been
fi nished successfully.
- In case of long unit stops, and forcibly if they happen in the winter
season, the coil must be emptied.
- Possible water freezing must be avoided: glycolling water or by using
anti-freeze thermostat that triggers the 3-way valve.
- The direction of the water fl ow must be correct and so the following
indications must be observed:
Split-system cooling units
and heat pumps
13
Page 14
Hole for the power supply
Another hole must also be
drilled to connect the hose
to the electric power supply.
Step 2: fasten the frame to the
panel with selfturning screws.
Step 3: insert the hose
through the hole made for
the connection in the electric
panel.
Note: The connection of the
necessary elements for the
adequacy to the handling of
the unit must be performed by
the installer.
Access panel
Step 4: close the access
panel. The outlet is ready for
ducting.
In order to remove the
electrical heaters the
power supply cables must
be disconnected from the
terminal board and the hose
taken out.
Hose
Electrical
heaters
Safety
thermistors
Rail
Then, unscrew the screw that fastens the electrical heaters’ frame and
take out by the rail, as shown in the following images.
Reference
corner
Frame holes
Kit assembly:
When the frame with the electrical heaters is provided in a kit, follow
the steps below for connecting it:
Step 1: place the frame on the panel to set the hole positions that will
fi x the frame to the panel (use the top left-hand corner as a guide).
Split-system cooling units
and heat pumps
14
Page 15
11. COMMISSIONING
WICHTIG: WIEDERBEHEIZUNG DER
OLWANNE
IMPORTANT: CRANKCASE HEATING
IMPORTANT: SURCHAUFFE CARTER D’HUILE
IMPORTANTE: RISCALDARE IL CARTER
DELL’OLIO
IMPORTANTE: RECALENTAMIENTO DE
ACEITE DEL CÁRTER
KOENNEN.
TO ALLOW THE COMPRESSOR(S) STARTING
AU PREMIER DÉMARRAGE OU APRÈS UNE ABSCENCE
TENSION 24 HEURES AVANT D’AUTORISER LE
DÉMARRAGE DU(DES) COMPRESSEUR(S).
AL PRIMO AVVIAMENTO U DOPO UNA INTERRUZIONE
PROLUNGATA DELLA ALIMENTAZIONE ELETTRICA,
LASCIARE LA MACCINA SOTTO TENSIONE PER 24 ORE
PRIMA DI AUTORIZZARE L’AVVIAMENTO DEL(DEI)
COMPRESSORE(I).
ANTES DEL PRIMER ARRANQUE O DESPUÉS DE UNA
AUSENCIA DE CORRIENTE POR UN LARGO PERIODO DE
TIEMPO, CONVIENE QUE LA UNIDAD ESTÉ CONECTADA
UN MÍNIMO DE 24 HORAS.
BEIDER ERSTEN INBETRIEBSETRUNZ ORDER NACH EINER
LANGEN STROMUNTER-BRECHUNG BRINGEN SIE DIE
MASCHINE UNTER SPANNUNG 24 STRUNDERLANG
BEVOR SIE DEN(DIE) KOMPRESSOR(EN) EINSCHALTEN
FOR THE FIRSTSTART OR AFTER ALONG TIME OUT OF
VOLTAGE PUT THE MACHINE ON LIVE 24 HOURS BEFORE
DE COURANT PROLONGÉE, METTRE LA MACHINE SOUS
COMPRESOR SCROLL.
COMPROBAR SENTIDO DE GIRO
COMPRESSEUR SCROLL.
VÉRIFIER LE SENS DE ROTATION
SCROLL COMPRESSOR.
CHECK SENSE OF ROTATION
- All the 38HB/HF units are equipped with scroll type compressor
and have a phase control relay. Verify that they turn in the correct
direction and, if not, reverse the power wires.
- When commissioning the compressor, check
the subcooling and overheating and thus
verify if the refrigerant load is appropriate to
the operating conditions.
R 410A
- If the refrigerant load has not been completed and is lower than that
required, the suction pressure will be rather lower than normal, and
overheating when suctioning from the compressors will be high.
This can cause an interruption in operation due to activation of the
refrigerant load safety device.
- If the refrigerant load is insuffi cient the liquid sight glass will not be
clean, gas bubbles will appear as foam. To adjust the refrigerant
load, a schrader valve is built into the unit on the liquid line.
The liquid sight glass is located on the support next to the electric
panel.
Liquid sight
glass
Liquid
line
Gas
line
Main door
switch
Access to the
electric panel
Checks prior t o c om m issioning
- It is advisable to make a complete sketch of the installation including
the location of the unit and all the components used. This will be very
helpful for maintenance and repairs to the installation.
- The following must be verifi ed:
• That the electrical power supply remains constant and that it
corresponds to that featured on the unit data plate.
• That the electric installation has been carried out according to the
electric wiring diagram provided with the unit (consult the chapter
on “Checking before commissioning”).
• The correct connection of the sensors supplied with the unit.
• That they are no cables close to heat sources.
- Once the above verifi cations have been carried out, the control circuit
is supplied with voltage by the automatic control switch. It is necessary
to leave the compressor crankcase heater with voltage for 24 hours
before starting the compressor.
High pressure
schrader valve
Low pressure
schrader valve
- Verify the absence of any leaks of the refrigerant. In the event of
a leak completely empty the unit using a specifi c recovery unit for
R-410A. Refi ll by following the recommendations featured in the
chapter “Checking before commissioning”.
- Check the unit operation and verify the safety devices.
Possibl e problems at com m issioning
All indications given in this brochure must be respected and
complied with to guarantee a correct operation of the units.
Next, several possible operation problems are stated which could
happen if the conditions of the commissioning are not appropriate.
- Air flow lack: very high differences between inlet and outlet
temperatures, originated by a high pressure drop in the ducts, or by
other causes that impede the correct circulation.
- Air recirculation in the unit, originated by some obstacle in the air
aspiration or outlet.
- Noise problems because of excessive air fl ow in the grille.
- Water overfl owing to the pan problems, originated by an excessive
fl ow, an incorrect siphon installation or because a defective unit level.
- Refrigerant circuit humidity problem, because of an incorrect vacuum
realization.
Split-system cooling units
and heat pumps
15
Page 16
12. MAINTENANCE
Air fi lters
- Clean regularly. Depending on the installation conditions, the fi lter
aspect must be examined to defi ne the cleaning periodicity.
- Gravimetric fi lters. Cleaning the fi ltering mesh can be done with a
household vacuum cleaner, or else by submerging it in water.
COOLING mode HEATING mode
Compressor
Aspiration pressure bar
Compressor
Aspiration pressure bar
Aspiration temp. (1) ºC Aspiration temp. (1) ºC
Condens. pressure bar Condens. pressure bar
Condens. temp. (2) ºC Condens. temp. (2) ºC
Air
condenser
Gas inlet temperature ºC
Air
evaporator
Liquid inlet temperature ºC
Liquid outlet temp. (3) ºC Gas outlet temp. (4) ºC
Air inlet temperature ºC Air inlet temperature ºC
Outdoor temperature ºC Outdoor temperature ºC
Air outlet temperature ºC Air outlet temperature ºC
Air
evaporator
Air inlet temperature ºC
Air
condenser
Air inlet temperature ºC
Air outlet temperature ºC Air outlet temperature ºC
Liquid inlet temperature ºC Gas inlet temperature ºC
Evap. outlet temp. (4) ºC Liquid outlet temp. (3) ºC
Undercooling (2) - (3) ºC Undercooling (2) - (3) ºC
Overheating (4) - (1) ºC Overheating (4) - (1) ºC
Opera t iona l c heck s
Check the unit operation by verifying the electronic control and the
safety devices.
It is also recommendable to create a report, taking note of the date,
which includes the following information:
- the nominal power,
- current absorbed by the compressors, fans, and other electric
components,
- the signifi cant temperatures of the cooling circuit (see attached table),
- and other aspects that are considered interesting, such as, for
example, alarms detected by the electronic control of the unit.
The recording of these parameters whilst the unit is running allows
controlling the installation performance and it is the best possible way
to avoid breakdowns since the analysis of these data makes early
detection of anomalies possible or the provision of the necessary means
available to ensure that they do not take place.
The minimal maintenance operations and their periodicity will be made
according to the national regulations.
Any intervention on the electric cooling components must be made by
a qualifi ed and authorized technician.
Technicians who intervene with the unit must use the necessary safety
equipment (gloves, goggles, insulating clothing, safety shoes, etc.).
Furthermore, if working around sources of significant noise, we
recommend the use of noise-dampening headgear.
V-220004
Caution: Before intervening in the unit, cut off main
power.
General recommendations:
- Do not lean on the unit. A platform must be used to work on a level.
- Do not lean on the copper refrigerant tubes.
- Keep the unit clean.
- Keep the space surrounding the unit clean and cleared in order to
avoid accidents and ensure the proper ventilation of the coil.
- Perform a visual (remains of water or oil below or around the unit)
and auditory inspection of the entire installation.
- In general, a corrosion control must be performed on the metallic
parts of the unit (frame, bodywork, exchangers, electric panel, etc.).
- Check that the insulation foam is not unstuck or torn.
- All the electric connection states must be checked as well, as well
as the air tightness of the different circuits.
Filter removal:
The fi lter is assembled over a steel metal profi le. By dragging a tab, it
slides laterally by the rail. Then, the fi lter is removed vertically.
Frame in
displacement
Tab for
sliding
Split-system cooling units
and heat pumps
16
Page 17
Refrigerant
Only qualifi ed personnel must perform a periodic tightness control, in
accordance with the regulation (CE) Nº 517/2014.
- The frequency of checks is no longer related to the load of refrigerant
but to its global warming potential:
Load kg x GWP = t CO2e
Carbon dioxide equivalency (t CO2e ) is a quantity that describes, for
a given mixture and amount of greenhouse gas, the amount in tonnes
of CO2 that would have the same global warming potential (GWP).
Please, consult data of carbon dioxide equivalency (t CO2e) provided
in the technical characteristics tables of this manual.
- Operators shall ensure that the unit is checked for leaks ad minima
according to the following frequency:
• t CO2e < 5 ............not subjected
• t CO2e 5 to 50 ...... every year
• t CO2e 50 to 500 ... every 6 months
• t CO2e > 500 .........every 3 months
- Where a leakage detection system has been installed the frequency
of checks is halved.
Note: Never forget that the cooling systems contain liquids and vapours
under pressure. The service pressure of R-410A is approximately 1.5
higher than that of R-407C.
- All necessary precautions must be taken during the partial opening
of the cooling circuit. This opening entails the discharge of a certain
amount of refrigerant to the atmosphere. It is essential to limit this
quantity of lost refrigerant to a minimum by pumping and isolating
the charge in some other part of the circuit.
- The refrigerant fl uid at low temperature can cause infl ammatory
injuries similar to burns when contacting the skin or eyes. Always use
safety goggles, gloves, etc. when opening ducts that may contain
liquids.
- The refrigerant in excess must be stored in appropriate containers
and the amount of refrigerant stored at the technical rooms must be
limited.
- Refrigerant barrels and deposits must be handled with precaution
and visible warning signs must be placed to attract attention over
the risks of intoxication, fi re and explosion linked to the refrigerant.
- At the end of its useful life, the refrigerant must be retrieved and
recycled as per the current regulations.
Compressor
In the case of compressor replacement:
- Disconnect the unit from power supply.
- Completely empty the load of refrigerant using a specifi c recovery
unit for R-410A
- Disconnect electrically the compresor.
- Carefully unscrew the suction and discharge piping.
- The compressor is fi xed onto the platform with 4 screws Ø 8 mm.
Unscrew the fi xings.
- Place the new compressor and check that it has a suffi cient oil charge.
Warning: when tightening the compressor screws, please consult
the maximum torque that can be applied.
If a torque wrench is not available, tighten them until noticing
resistance, then tighten the screws by turning them 3/4 of a revolution.
- Screw the suction and discharge piping.
- Connect the compressor in accordance with the circuit diagram.
- Make vacuum and next, reload the gas into the unit according to
load data provided in the technical characteristics table and in the
unit’s data plate.
Liquid sight glass
- This sight glass, located on the liquid line, after the dehydrating
fi lter, enables controlling the refrigerant load and the presence of
moisture in the circuit. The presence of bubbles in the indicator
means that the refrigerant fl uid load is insuffi cient or that there are
non-condensable products in the cooling circuit. The presence of
moisture is characterised by the change in colour of the control paper
located on the sight glass.
- In the 38HB/HF units the liquid sight glass is located on the support
next to the electric panel.
Warning:
If the unit stops, certain indicators may appear in yellow; the change in
colour is due to the sensitivity, which depends on the temperature of the
fl uid. These will change to green after a few hours of the unit operating.
If the indicators remain yellow, that will indicate the presence of
excessive humidity in the circuit. This will require the presence of a
specialist.
Compressor
Liquid sight glass
V-220005
Air coil
- Check that the coil is free from dust and grease.
- Cleaning the accumulated dust on the coil can be performed with
a vacuum cleaner perpendicular to the fi ns or with a low-pressure
water cleaner. Grease can be removed with water with degreaser.
Do not put stress on the fi ns as they could deform.
Use safety gloves for this task. Take care with the sharp
parts of the coil.
Split-system cooling units
and heat pumps
17
Page 18
Filter drier
- The fi lter function is to keep the cooling circuit clean and without
humidity, neutralising the acids that can be found in the cooling
circuit.
- Verify dirt measuring the difference in temperature at the piping level,
at the inlet and at the outlet of the fi lter.
- If necessary, replace.
Servomotor (optional)
It is advisable to check the condition of the servomotors in outdoor units
38HB/HF with condensation control damper.
Damper
Servomotor
Condensate drain pan
- Check that the condensate pan is clean. There should be no stagnant
water.
- Check that the drain is not clogged.
- Cleaning of the pan can be done with water and non-abrasive
detergent.
Filter drier
Main door switch
Electric panel
Condensates drain pan
Pan drain
Oil
Oils used for cooling machines do not post any threat to one’s health
if used while following the usage guidelines:
- Avoid any unnecessary manipulation of the elements covered in oil.
Use protection creams.
- Oils are fl ammable and must be stored and handled with precaution.
“Disposable” rags or towels used for cleaning must be kept away
from open fl ames and must be discarded by using the appropriate
procedure.
- Jugs must be kept closed. Avoid using oil from an already-open jug
kept in poor conditions.
Both the oil type as well as the volume needed for each model are
stated in the “Technical characteristics” tables given in this manual.
- Check the oil level and aspect. In case of a colour change, check
the oil quality using a contamination test.
- In the case of the presence of acid, water or metallic particles, replace
the affected circuit oil, as well as the fi lter drier.
- In the event of an oil charge change, only new oil will be used, which
will be identical to the original oil and taken from a jug tightly closed
until the moment of the charge.
Centrifugal fan
- Verify that the turbine and the motor remain clean.
- Foresee having a spare belt set for the fans.
- The motors and the fans have bearings that have been lubricated
and sealed and, thus, do not need further lubrication.
Oil separator (optional)
When the maximum equivalent length of the cooling line is greater than
50 metres, an oil separator must be fi tted.
- During the fi rst few days of operation check the oil level in the
compressor sight glass. If there is not enough, oil can be added (via
the compressor schrader valve or the unit low pressure).
Split-system cooling units
and heat pumps
18
Page 19
13. CONTROL AND ANALYSIS OF BREAKDOWNS
Symptom Cause Solution
Evaporation pressure very high in relation with
the air inlet
a) Charge excess
b) High air temperature
c) Compressor suction not air tight
d) Cycle reversing valve in middle position
a) Collect refrigerant
b) Verify overheating
c) Verify compressor state and replace
d) Check that the valve is not clogged. Replace if
necessary
Very low condensation pressure a) Gas lack
b) Compressor suction not air tight
c) Cycle reversing valve in middle position
d) Liquid circuit plugging
a) Search for leaks, complete charge
b) Verify compressor state and replace
c) Check that the valve is not clogged. Replace if
necessary
d) Verify the dehydrating fi lter and expansion valve
Condensation pressure very high in relation to
the air outlet, high pressostat cutoff
a) Insuffi cient air fl ow
b) Air inlet temperature very high
c) Dirty condenser (does not exchange)
d) Much refrigerant load (fl ooded condenser)
e) The condenser fan is broken down
f) Air in the cooling circuit
a) Verify the air circuits (fl ow, fi lter cleanliness...)
b) Verify the control thermostat readjustment
c) Clean it
d) Collect refrigerant
e) Repair
f) Make vacuum and load
Evaporation pressure too low (low pressostat
cut-off)
a) Low fl ow in evaporator. Air recirculation
b) Frozen evaporator
c) Liquid line as different temperatures at fi lter inlet
and outlet
d) Gas lack
e) Very low condensation pressure
f) Evaporator fan broken down
a) Verify the air circuits (fl ow, fi lter cleanliness...)
b) Verify defrost
c) Replace fi lter
d) Search for leaks, complete charge
e) Temperature of air or water in condenser very
low (air or water fl ow very high), adjust fl ow
f) Repair
Compressor does not start, does not make
noise (humming)
a) No power
b) The contacts of a control element are open
c) Timing of anti cycle short does not allow the
starting
d) Open contact
e) Contactor coil burnt
f) Indoor klixon open
a) Check differential, fuses
b) Verify the safety chain of the electronic control
c) Verify electronic control
d) Replace
e) Replace
f) Wait for reactivation, verify current absorbed
Compressor does not start, motor sounds
intermittently
a) Electrical power supply very low
b) Power cable disconnected
a) Control line voltage and locate voltage drop
b) Verify connections
Repeated compressor starts and stops a) Because of high pressure
b) Control differential too short (short cycle)
c) Insuffi cient gas, cut-off because of low pressure
d) Dirty or frosted evaporator
e) The evaporator fan does not work, cuts off the
low pressostat
f) Expansion valve damaged or clogged by
impurities (cuts off low pressostat)
g) Dehydrating fi lter clogged (cuts off low safety)
a) Verify charge
b) Increase differential
c) Search for leak, reload unit
d) Clean, verify evaporator air circuit
e) Replace or repair
f) Replace, as well as fi lter
g) Replace
The compressor makes a noise a) Loose attachment
b) Oil lack
c) Compressor noise
a) Fix
b) Add oil to recommended level
c) Replace
Noisy operation a) Unit installed without antivibration protection a) Place base over shock absorbers
Cycle reversing is not carried out:
- No defrosting
- Does not change winter - summer cycles
a) Electrical fault
b) Inversion valve coil defective
c) Defrost method not working
d) Cycle reversing valve in middle position
e) Control fault
a) Locate and repair
b) Replace
c) Verify parameters
d) Tap with running compressor. Replace if
necessary
e) Locate and repair
Split-system cooling units
and heat pumps
19
Page 20
Order No.: 10127, 07.2015. Supersedes order No.: New Manufactured for CARRIER in Spain.
The manufacturer reserves the right to change the specifi cation without prior notice. Printed in the European Union.
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